Folding mechanism.



E. L1. m

FOLDIIG IEUHLIIHI.

nnwnlol nu lov. n. man.

Patented 0st l2, ii. n unrHuh 1.

POLDIIG multi.

' AN'LIGAYII "LID l0'. ll. IWI. 936,710. www@ 00L 12, wou.

t Illl'-llllf t. Hl 'u 3. G. 0088. FLDIIG IEUHAIIBH.

Arrmon'xol nu lov. n. noa.

Pawtd Oat. l2. 1909.

l llllTI-IIIIT l.

'ULDllG mami.

muwuxol nu lov. n. um.

936,710. 4Immun on x2, wos.

. thrust -erence being had to the accompanying UNITED STATES PATENT OFFICE.

im O. OO, OI' CHICAGO. ILLINOIS. ASSIONOB TO THE 0088 PBIHTIIG OOIPLDIY, 0I CHICAGO, ILLINOIS, A CORPORATION 0l ILLIIOIS.

IOLDINO Imm.

actuation et latten latest.

Patented Ovt. l2, 100i).

application aua nunmia, iaoa. amai xo.

'1b all whom il may uiiim:

Be it kiioivii tlnit l, Santini. (i. Goss .a nim of nl unimi sims, residing .i Cl"- ca o, iii tie county of Cook and State of ll inois, have invented certain new and useful lm rovements in Folding-Mechanism, of whic the following'is a descriptioni refrawiii gy invention relates to new and improved folding mechanism for printing and its object is to provide new an im roved mechanism by means of which the olding blade is done away with and the paper is folded by a blast o air suitably directed hetweeii the folding rollers to thrust the pa r into the bite of the rollers. Genera ly im I accomplish this object by meiiiis o mec nisni, which broadly stated, consista of a pair of foldin rollers or equivalent m forwa ing means preferably in the forni of a rotary carrier, which .forwards 4the sheet of a to be folded into proper operativere ation' with the foldi rollers, and an air discharge pipe ind suitable automatically-'operated valves which discharge a* blast of air against the sheet of paper o iposite the folding rollers so iis to sheet to lie folded into the bite of the folding rulleni.

My invention also relates tothe providing of a new and improved automatically-o erated valve desi ied to siiitiibl control t ie blast of air in tline above-iiiiiiied' mechanism and to so operate that when the preis is stp ied.no mutter at what int of its revo ution,tlie valve will he e osed so thiit iiir will not escape.

My invention further contemplates other improvements in pneimiaticiil y operated foldin r mechanism hereiiiiilterl specifically deiii'ii ied. l

lu the drawin :Figiire 1 is n front elevation of the fo der. l'ig. 2 is ii side elev'ation of the same. Fig. 8 is an enlarged detail, heilig an end view of the rotary carrier carrying the air-blast ap ratus, hein a vert ical section on line of Fig. 4. .ig. l is an enlarged detail being a vertical section on line 4.-4 of `ig. 8. Fig. 5 is an enlarged detail, being a front elevation of my improved viilve and operating mechanisiii, showing the Vvalve iii vertical section.

Fig. 6 is an enlarged detail, being a section on line 6-6 of Fig. 5. Fig. T is nnenlargm] detail, being a section on line 7-7 of Fig. 5. Fig. 8 is a still more enlarged detail, being ii section through rt of the ro carrier, showing the mounting of the discharge tubes. Figs. Il. 10z 1l and 12 are dia rainniatic views, showing the operation of t e folding mechanism at ditlereiitstages of its work.

Referring to the several figures of the drawi 18 indicates `side -frames and 14 the en frames of the folder.

15 indicates the ordinary'V-shaped former or internal 'de by means of which, co.- operatiiig wi the external turiiers 16 at thc point of the former, and forwarding roller 7 at the top of the former, the paper is folded longitudinally. As this lon 'tudinnl folder may be of any well-known orin and construction and operates in the well-knowii iiianner,' I have not shown the means foi' driving the external tumors or forwarding rollers 16 iiiid the forwarding roller 17, inl

order not to encumber the drawings with unnecessary li res, as it. will of course be understood at they are driven in any well known and ap roved niaiiiier.

18 indicateat eweb of passii over the former and being fol etlbxetween t e extemal turners ltl.

10 indicates the driving gear of the irene. and 20. 21, 22, 23, 24, 25, 26 and 27 in icute Fears li means of which the several parts iei'einn ter described iii'e driven. The 26 and 27 nre mounted upon ii shaft 28. upon which is mounted ii rotary carrier 2i). The rotn ry cii i'riei' 21| is provided with the usual pins 30 which iinpale thel lend end of the web and carry it around with the rotary lcarrier. As these pins opei'nte iii the wellknown manner iind forni no piirt of my present invention. it is not iiessiir'v to describe them here. The rotary carrier is nlso provided with block- 81 provided with the iisuiil cutting grooves 82 which eoperate with the knife 33 ou a cutting ylinder 34 to sever the paper trans versely in the well-known manner. The cntting cylinder 84 iii preferably one-half the size o .the rotary carrier 29 and is provided with only one cuttiiil knife, which coper ates alternately wit the two grooyes 32 und is provided upon allv opposite the knife 33 with a l dinal groove 35 which coperates with hereinafter to forni a tranaveene its surface diaiiietric crease across the aper to mark the line of the transverse fold) and to assist in the foldin hereinafter described.

e shaft 28 of the rota carrier 29 is journaled of coarse in suite le journals in the frame, and is centrally bored each end to form a central tubular open 36 which extends inward axially of ite ft to a suitable distance within the rotary cari-ier. These tubes extend inward from each end of the shaft, and, at a suitable point within the rotary carrier, they bend outward so as to open upon the exterior of thehshaft 28, said openings being respectivel dia metrically opposite each other. Re erring to Fig. 4 where these parta are liest shown the outer ends of the shaft 28 are provided wit-h disks 37 each of which is secured rigidly tothe end of the shaft. Fig. 4, for convenience of illustration, shows only one end ot' the shaft with the parts now to be described, butit will be understood that siini lar parts are laced upon the other end of the shaft 28 a so.

38 indicates a cylindrical cup provided with n. flange 39 upon its inner end and which is rotatably mounted one upon euch i end of the shaft 28 with the llango 39 bearing closely against the shaft inside of the i disk 37.

40 indicates a packing which is interposed between the flange 39 and the disk 37 so as to atlord an air-tight packing around the shaft.

The cup 38 is held in position by means of the nut 41 which is screw-threaded upon the end of the shaft inside of the flange 39 and operates to'hold the cup 38 against the interpcsedtieacking and the disk 37 so as to revent escape of air entering the sha as hereinafter described.

42 'indicates a cap which is screw-threaded into the outer end of the cup 38 and is referably provided with a cOnicaLshaped) extension 48 which enters a correspondinglyconicall :shaped depression in the disk 3i.

44 in icates pipes which enter the caps 42 at each end of the shaft 28 in register with the tubular opent 36 and which are con-i nected to valves 4 mounted on the framework one at the front and one at the rear of the folder, and operating to intermittently adinit compressed air to the tubes 86. The detailed operation and construction of these yalves wi l be hereinafterV described.

46 indicates pipes which lead from the valves 45 to a suitable source of compressed air as reservoir 47, und pump 48. eferring again to Figs. 3, 4 and 8, 49 indicates discharge pipes, which, in the form in which my invention is embodied in the drawi s, are two in number and are located iametricalgop ite each other in suitable recesses in t e rotary carrier 29, and are midway between the two cutting grooves 32. These discharge pipes are held in position hy .wt screws ."l hy means of which tht-ir position muy Irc slightly ad juated in the rotary carrier. As is best shown in Figs. 3 and 8, the dischar 'e pi es Y 49 are so shaped as to narrow to a t iin ischar edge 52 which projects slightly hcyon the surface of the rotar carrier .9 and are provided with a thin discharge slot ."3 which preferably extends substantially the length of each discharge pi 49. 54 indirates pipes which are suitab y supported inside of the rotary carrier and are connected by short stub iipes 55 with the tubular openings 36, an b means of other pipes are connected wit the discharge pipes 4o. It will be obvious from the description so i'ar that whenever the valve 45 is opened, compressed air paea tlirou h the pipes 44 into the tubular openings 6, from thence into the tubes 54, 55 and 56,- into the discharge pipes 49, from whence the air issues through the slots 53 in a thin stream suhstantiully the width of the rotary carrier.

Figs. o, 6 and 7 show the detailed construction of the ialves 45. Referring to those figures, 57 indicates a cylindrical valve casing which is mounted .upon the end framework 14, one at the front and one at the rear of the folder frame. The ipes 44 and l6 enter the cylindrical casing t irougli suitable openings therein, as is best shown in Fig. 5. 58 indicates a cylindrical .valve member which is mounted to swin in the cylinder casing 57 und is provide at its outer end with an operating arm 59. As is best shown in Fig. 7, the cylindrical valve member 58 is mounted in the cylindrical casing 57 by means of a holt 60 so as to oscillatc amtig it in the casing, and is rovided with a cciitriil opening 61 into w ich two tubular openings 62 und 63 enter, passing into said central openings from the exterior of thc cylindrical valve member 58. The openingsi! and '63 are so placed as to simultaneously register with the openings in the casing 57 through which the pipes 44 and 4Q enter when the valve member is oseillated.

1t will he 'obvious from the above description that when the oscillating valve member 58 is swung, as the o nings 62 63 register with the entrances o the ipes 44 and 46, compressed air will entert rough the pipe 46 and the opening 63 and be discharged' through the opening 62 and pipe 44 into the rotary carrier and througi the' device` above descrihl itito one or the other of the discharge tu s and be discharged from thence through the slot 58.

The valye is o .rated by the ,followin v mechanism. 64- see Figs. 1 and 2) indicates ii shaft which is journalcd in the frame and is driven by the gear 24 which is cured thereto. lpon cach ont of the Ihaft 64 is keyed u disk 65. Referring now lo mme F iga. 5 to 7, inclusive, where these parte are bed. illustrated, the disk 85 is provided with a curved alot 06 concentric with the centor of the disk and suhtendingan angle of aliout ninet degrees. 67 indicates disks which are l y journaled on the shaft 04 against the inner surface of the disk 05 and are held in position by a collar 68 and setscrew 69. 70 indicates a pin which is rigidly secured to the disk 67 and passes outward through the alot 06. 71 indicates plates which are mounted upon the framework, one at the rear and one at the front of the folder, upon suitable blocks 71 sothat they may stand out from the framework. Thelplatea 71 are nrovided with a longitudinal ot 72. 78 indicates n `l which is pivotally mounted so as to oslwhidi is formed in 76 indicates a stud w ich is circular in secin a suita`ble ear 74 en the bracket 75 l with the plate 7l.

tien and which is slidirly mounted in the slot 72. 77 indicates a which is slidingley nwnntediiithelugandwhich,atitsot r ""...py' who... 'hhitid 3zi7sdhc" v in icates s. whiehismountedupcntherod77 nearitalowerend. Nindicatesaspiral 'whidi bears at one end inst the attheotherend ont bearing ditelslinkoneendofwhich is eennedad to thepin and the ril-:llllillar to the ri lestes a lever whic i w'crkbelow the plate en is provided with a races the inner end of the a l which is pivothead 85 at the 82. 86 indicates a ly mounted in the pivpivoted'at its inner end to the ring 78 and emen the outside of the tes a bearing head which 80 near its up )er end. 88 indit a spiral spring which rs at ivoted 'lug84 and at .the bearing head 87.Y The springs 80 and-8 tend to move therods inward toward each other when tree to do so. .the lever 82 is rovided s si rig 5 heohvions' that as tlie tlxed disk rotates in the direction indicated by the arrows en Figa. 1 and ti, as soon as the rear of the tiengea the pin 70 on the in will moved so as to move in one direction or the other the alot 72, thus rocking the lever u ng for the pur of descriptien that the stud 76 is at left-hand end of the slet 72, theparts are so adjusted that the slot 60 will be ii little more thun ninety de farther to the left of tln` position 'iown in Fig. i with its resi' end ongugiii the pin T0. und the operstin lever 59 will e inthe posi ion shown in' IH 5. and the lower arm o the lever 82 wi lie tl() will lie at the left-houd end of the slot 8l). As'tlie disk 65 rotutes with the-reni' end of the slot tltl in en iigeinentwith the pin 70.*tlie stud 76 will! be iiioved to thc ri ht in the slot 72. swinging the lower iirni o the lever 82 towuid the left. the pin llt) moving freely in the slot so un to not operute the lever iitl. As soon, however, us the slot has moved into such position thnt the rods 77 and 86. which forni, as it. will be eeen, a

centers,-t at is to say when the parts ure in the position shown in Fig. ,-tlu-. lower end of the lever 82 as shown in suid ligure. will be swung far enough to thc left for the pin to be engaged at the right hand end. of the slot 89, in other words, in the position shown in Fig. 5.' At this instant. the two rods being past centers, the springs will itantly operate to throw the stud rapi en of the sot 72, bringing the iin 70, moving of course much more rapid y than the rotation of the disk 05, to tlie'lead end of the slot or nearly so,-that is to say, so that the link 81 will come in line with the slot 72. `'lhiii will operate e'f course to swing the lever 82 rapidly moving ita lower end almost instantly to the left in Fi il, und carrying 'the pin 90 with it and tlliI fore carrying the operating arm 59. This will canse a q ick oscillation of the oscillating valve member 58, carrying the openings 02-88 Brat into simultaneous registry with and then beyond theopenings o the pipes 44 and 46 into the casing 57. As the open- 'ngs 62-83 come simultaneously into registry with the lpipe openings 44-46. air under pressure wil be iu niitted to the apparatus, as above described, and the valve will be almost instantly closed ugsin. The disk 85 continuing to rotate, the parte will remain stationary until 'the rear end of the alot 06 iigain engages the pin 70, when the pin 70 'i registrv of the openings 02-03 with the pi 44 sind 46 and their aluicet instant einem;

sort of to gle-joint lever, have pained their.

to the ri ht nearly to the right-hand of course swung to the right so thnt th(` pin lll will be again carried around with' the disk A ilu` ralic H is rapidly osi'illated, once to the line o the same time the loft und once to the right with each rotalioii of llii' disk tif. lt will thus be wen that inasmuch as it is the airing-operated action of the to 'gle-levers t at works the valve. as this va ve is normally in a closed iosition and the operation of the toggle levers at the same movement opens and clinics the valve. it will not be possible for the valve to be open,l so as to permit the escape of ai; by a stoppage of the press, no matter at what point the press stops.

.'lhc valves are so timed as to operate alter initel v.that is to say, one valve opensy up the passage into one of thedischarge pipes and the other valve opens the passige into the other, and, operating alternately, first one discharge ipe and then the other operairs inthe fol( ing of the paper.

91 indicates a pair of. folding rollers which iii-c mounted hclo'w the rotary carrier 29 in the usual manner, and, driven in any well-known manner, operate in the usual way to fdld ii sheet of paper thrust into their bite.

'lhe o ration of the devices is as follows, antlwis best illustrated in the diagrammatic Figs. 9 to l2. The lead end of the web, longitudinally folded, is impaled upon the impaling pins in the carrier, as is shown in Fig. 9, and is carried around the carrier in the ordinary manner. When the vcarrier has been moved one-quarter of a 'i revolution, as shown iii Fig. 10, the notch 35 iii the cutting cylinder 84 is bro t into position to register with the relative y shar edge of one' of the discharge ine 49, whi forces the r into the note and marks tpl e transverse fold, to be subseqiiently made. As the parts'reach the posi. tion shown in Fig. ll and the line of the fold is brought opposite the folding .rollers 91, the cutting ltnife severe the paper trans versely and at this moment one of the'valves 4.'. which connects 'with the discharge tube about to operate to fold the sheet is and a blast of .air issues from-the alot in the discharge tube against the paper, which, at from the pins engaging the said blast vof air operating .against t e crease across it, forced into the bite of the folding rollers and the paper is folded transversely. The next sheet its lead end, is b of course is folded in the saine manner by the operation of the discharge i. u n the opposite side of the carrienpli po e folded sheets are then discharged and delivered byaii v suitable delivery mechanism, as by the rotarv tly 02 and slow moving tapes 93, which. being of the well-known form and description'. are only conventionally illustrated.

What I claim a mg invention and desire to secure by Letta stent iszsenno 1. The combination with folding rolls, a moving carrier adapted to enga a sheet of paper and forward it into fo din f position with reference to said folding ro ls, and a compressed air supply, of a discharge pipe mounted on said carrier and adapted to discharge a sheet of air between said folding rolls, Jconnections between said discharge pipe and said compressed air supply, and automatically -operatilig valve mechanism adapted to open the connections to said discharge ipe when said sheet is iii ition to b`e fo ded and then to automatica ly close said connections.

2. In combination, folding rolls, a rotary carrier ada )ted to engage a sheet. of paper and carrv it into folding position opposite said folding rolls. a source of compressed air supply, a discharge pipe carried by said carner and adiited to discharge a blast of air between sai folding rolls, connections hetween said discharge lpipe and said coinpressed air supply, an( automatically-operatin valve mechanism adapted to momentari y open said connections as said sheet is brought into folding position and then close the same. -3

8. Ina pneumatic folding mechanism, the combination with folding rolla, a rotary ca rrier adapted to en ge a sheet of paper and carry it into folding ition op ite said folding rolls, mechanism ada t to crease the paper on the line to be fo ded while on its way to folding position, and a source of compressed s ir supply, of a discharge pipo carried in said-rotary carrier and adapted to discharge a blast of air between said folding rolls, between said sourceof compressed air sup ly and said discharge ipe, and autoniati lyoperating valve mec a'nisin adapted to momentarily open said ,connections as said sheet is brought into folding. position and then close the same.

4. ln apneumatic folding mechanism, the combination` with folding rolls, arotary carrier ada ted to en ge a sheet of paper en d carrv it into fol i position opposite said folding rolls, mec adapted to crease the paper on the line to be folded while on its way to folding position, and a source of compressed air sup l of a discharge tube mounted on sai having a narrow o nin of substantially the len th ofthe with o thesheetofpa r and a apted to discharge a blaltJof-,air tween said folding rolls, connections between said source of comp air sup said discharge pipe, and automatica yoperating valve mechanism adapted tn momenarily opcn said connectioiisas said sheet is brought into folding position and then close the same.-

5. fn a. pneumatic folding mechaniln, the combination with folding rolls, a rotary carrier and.

und,

earrier adapted to enga a alicet. of pa r and forward thea-mme igteo folding poaititn opposite said folding rolls. a rotary inemlier having a creasing groove and adapted io eoperiite with said rotary carrier, and a source of compressed air supply. of a diai-luirge tiilie on said rotary carrier adapted to eoi'pei'ate with said ei'eiising groove on said rotarv iueuilier to crease the aper along.

its fold line, and ada ited lo iscliarge' a lilast of air hetweeii said folding roll. coliueeiious betweensiiid diseliiir .tiihean said souree of uunpiesiad air. ani automaticallyoperiitiiilg valve iiieehaiiisin adapted to inoiiieiitari v open said eoiiiieetions as said sheet is hroughl into folding position land then close the saine.

Ii. ln a pneuiiiatie folding:A ucliaiiisiii, the i-oiuliiniitioii with folding rolls, ii' rotary earriei adapted to engage a sheet of paper and earry it into folding position opposite said folding rolls. a euttingiueinher on said i-oliiry earrier. a vulling cylinder adapted to ioi'iperate willi said rotary carrier to aaver the pa ier lrausveisely and having ii longitiuliiia creasing groove. and a source of eonipiessed air supply. of a discharge tube ou said rotary carrier adapted lo coperate with siiiil creasing groove ou said euttniz iiieiuher to crease the mper along its fold line. and adapted to i isehiirge a; lilast of air lielweeu said folding rolls. eoiiiiertioiis Iii-tween said disehare luhe aud said source lill of i-oui iressod air. und autoiuatiriilIy-operatiii va ve iiieehanisiu iulapled to momentar v oien said eonneetions as said sheet is Iii-oui: it into folding position und then elosie the saine.

ln ii piieiuiiittie folding iiieeIiilnia-ini. i-oiiiprising folding!v rolls. a rurrier adapted lo engage asheet of paper and forward the salue iulo foldiii iosilion opposite said folding rolls. a i iseliurge pipe adapted to ilseliiirge a liliisl of air lietween saiil folding rolls. a souree of roiupressed air supply.

.and eouiieetioiis lielweeu said souri-e ot eoiiipressed air supply and said discharge liilie. llie eonihiiuitioii willi a valve loi'ated in said minnei'lions. of siriuig-aetuuled uuiduiiiisiu adapted to quirky oielt iiliil iiiuiieiliately lose said valve when l ie sheet of paper is iii folding position. und uieiius l'or iiioviug said spriii'g-iu-luiiled nieeluiuisui iulo operative position.

M. lii a piieiuiialii' folding uieeliiinisiii. roiuprisiug folding rolls. a carrier adapted io vengingfe a slieel of paper and forwfrd the suliul into "folilii".r uisilioli opposite said folding rolls. a ilisi'luirge pipe adapted to discharge a liliist ofli' lielweeii said fold'- iug rolls. a souree of eoiiipresl air supply. :iml eoliliei'liolis lielivelli suiil sill'i'u of i'iuiipressed air supply and said discharge pipe. the eoiiiliiiialioii willi a valve loi-ated in said i-iuiueelons. ol toggle-joint lever uieehiiuisni connected with said valve, meanii for moving aaid toggle-joint lever mechanism ao tlial. the aame will paas reiitera, springs on aaid toggle-joint lever mechanism aiul adapted as anon aii the same nel centerzi to rapidly swing said to le-)olnt lever iiieehaniain anil uioiueiilaiily open and qiiii-kly close said valve.

il. ln a neuinalie folding mechanism, eoiiiprisingyolding rolls, a carrier ada ed to engage a sheet of per and forwa the saine tuto foldin position opposite said folding rolls, a diaciarge tuhe adapted to dilieharge a blast of air between said foldin rolls, a source of compressed air supply, an connectionsbetweensaidsourceofcom air supply and said discharge tube, t e coinliiiiation with a valve located in said connections. of a level" adapted to reciprocate aaid valve, a toggle-ioiut lever connected with said valve-operating lever, means for movin said t le-)oint lever, and springs on sai toggle-Joint lever ada ted aa soon aa the saine patries centers to iirtlierrapidly move iiiiid toggle-jouit lever and said valve-oper ating lever to momentarily open and quickly elose said valve.

l0.l ln a neumatic folding nieehaniam comprising olding rolls, a carrier adapt lo engage a sheet of paper and forwa the saine into folding position opposite said folding rolls. a discharge tulie adapted tu disehiirize a blast of air hetween said folding rolls. a source of compressed air supply, and eoiuiections Iii-tween said source of conipresiiedair supply aiul said discharge tiihe, the eoinhiiiatioii with ii reciproi-iito valve in said eonnectioiis. of a frame, ii slii e-bloelt iiiouuled in said fraiiie. a swinging lever conius`-teilwit|i said valve aiul willi-said slide. liloelt. o toggle-joint lever adapted to' pass eeiileis iti liolh directions and eiuiiu'eled lo said slide-liloek. means for reci irocatiiig said sIidoJiIoek. and springs on said ti le'onl lever adapted when said logglihjoiiit ever iasses "euters iii either ilireetiiui to ilitii'kly iiupiirt u further inoveuieut to siiid li ook to iiioiiieiilarily opeii and llieii elose said valve.

lll. lu 'u iueuuialie folding uieehaiiisni. i-oiiiprisiiig olding rolls. ii earrier iulapted tn eiigage a sheet of paper aud forward the saine iiilo folding position opposite said foldiup,r rolls. ii discharge tulie adapt .il to disiluirge a lilnst of, air lietweewial'iil folding rolls. a souri-e of eonipri-sicd air supply. and eoiuieel ioiisliel weeii siiiil souree of impressed .air supply und said ilisi'hiirge tithe. the eoiui liiinitioii with u valve easing having eiitriiiiee and disehiirge |uissages eiuineeled with said compressed air eouiieelious. au oseilluliug valve iueiiilier having enlraiiee aiiil diselnirge. .passages adapted lo siiiiiilluiieoiisly register willi llul eiilraiiee aiul disehai'ge passages iu said easing. and a valve stein ou said valve nieiulu-r. of ii frame. a hloek sliiliugly tiiiuiiitllfi ed in said frame, a swinging lever having a through said slot. :i link pivotally connecting slot connection at one end with aid valve stem and a connection el the other end with t laid sliding block, means l'or ieeiprmrating said sliding block. togglegioint levers pivotallv connected at their inner ends` to .smid sliding-block. and springs on said toggle-Joint levers adapted as y oon as they pass centers to 've a rapid further movement to sind siitgiig block` aud to operate said svijingln lever to move the two-wiiy [messages in sai valve member into and out of registry with the entrance and discharge openings of :laid valve eaaing.`

12, In a neuniatic folding mechanism, comprising' olding rolls. a carrier ada tcd to engage a sheet of .paper and forvva the same into foldin .itioii opposite said foiding'rolls, a isciigge tube adapted to discharge a blast of air between said folding rolls, a source of compressed air supply, and connections between said source of couipressed air supply and said discharge taire,

lthe combination with a valve casing having entrance and dischar assages connected with nid coinpreegeaii connections, an oscillating valve member having enti-ance and discharge pa s adapted to simultaneously register with the entrance and discharge passa in said casing, and a valve stem on sai valve member, of a frame, a block slidingly mounted in said franie,'a swinging lever havi a slot connection at one end with said va ve stein and a connection at the other end with said sliding block, a shaft, means for rotati the same, a disk secured tosaid shaft an having a curved slot, a member loosely mounted on said shaft and having'secured thereto a pin pmjectiug i to said sliding block. and

said piti with said sliding liloch. toggle-joint levers: pivotally connected at thcir inner' cndii Springe on Said togglc-joiiit levers adapted us. soon aA they pass centers to ive a rapid further Inovenient to -aid sliding block and to operate said lc\ci' to move the tivo-wav passages in said valve member into and out of registry with the entrante and discharge openings of lsaid valve casing.

I3. In u )nicuniatic folding mechanism. comprising oidiiig rolls, a carrier adapted to engage a sheet of paper and forward the aine into folding osition opposite said folding rolls,a diseini'ge tube adapted to discharge a blast of air between said folding rolls. usoui'ce of compressed air supply. and connections lictwecn said source of co||ipressed air supply and said discharge tube, the combination with a valve in said connections. of a fraaie rovided .with a slot. a .slide-Inhick mounted) reciprmating said slide-block in said slot. a swinging lever connected at one end with aid valve nml at tlieotlier end with said .-lide-hhak, n swinging rod pivotally connected at one end with said slide block, and a spring on said invingn i'od adapted as .won as said swinging roi pauses in either direction beyond :i line lwrlxindicular to Huid slot to quickly swingsaid rod and give -i-iaid slide Iiiock a rapid additional motion and canse said lever to momentarily open and close said valve.

SAMUEL (i. G( )89. Witnesses: a .lons L. J.\tfit.-i.\'.

\\'i|.|.|.\ii ll. Di: lh'siv'.

in said slot, means for I 

